<template>
  <div class="tags-view-container">
    <router-link
      v-for="(tag, index) in $store.getters.tagsViewList"
      :key="tag.fullPath"
      class="tags-view-item"
      :class="isActive(tag) ? 'active' : ''"
      :style="{
        backgroundColor: isActive(tag) ? $store.getters.cssVar.menuBg : '',
        borderColor: isActive(tag) ? $store.getters.cssVar.menuBg : '',
      }"
      :to="{ path: tag.fullPath }"
      @contextmenu.prevent="openMenu($event, index)"
    >
      {{ tag.title }}
      <i
        v-show="!isActive(tag)"
        class="el-icon-close"
        @click.prevent.stop="onCloseClick(index)"
      />
    </router-link>
    <context-menu v-show="visible" :style="menuStyle" :index="selectIndex" />
  </div>
</template>

<script setup>
  import ContextMenu from './ContextMenu.vue'
  import { ref, reactive, watch } from 'vue'
  import { useRoute } from 'vue-router'
  import { useStore } from 'vuex'
  const route = useRoute()

  /**
   * 是否被选中
   */
  const isActive = (tag) => {
    return tag.path === route.path
  }

  /**
   * 关闭 tag 的点击事件
   */
  const store = useStore()
  const onCloseClick = (index) => {
    store.commit('app/removeTagsView', {
      type: 'index',
      index: index,
    })
  }

  // contextMenu 相关
  const selectIndex = ref(0)
  const visible = ref(false)
  const menuStyle = reactive({
    left: 0,
    top: 0,
  })

  /**
   * 展示 menu
   */
  const openMenu = (e, index) => {
    const { x, y } = e
    menuStyle.left = x + 'px'
    menuStyle.top = y + 'px'
    selectIndex.value = index
    visible.value = true
  }

  /**
   * 关闭 menu
   */
  const closeMenu = () => {
    visible.value = false
  }
  /**
   * 监听变化
   */
  watch(visible, (val) => {
    if (val) {
      document.body.addEventListener('click', closeMenu)
    } else {
      document.body.removeEventListener('click', closeMenu)
    }
  })
</script>

<style lang="scss" scoped>
  .tags-view-container {
    height: 34px;
    width: 100%;
    background: #fff;
    border-bottom: 1px solid #d8dce5;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.12), 0 0 3px 0 rgba(0, 0, 0, 0.04);
    .tags-view-item {
      display: inline-block;
      position: relative;
      cursor: pointer;
      height: 26px;
      line-height: 26px;
      border: 1px solid #d8dce5;
      color: #495060;
      background: #fff;
      padding: 0 8px;
      font-size: 12px;
      margin-left: 5px;
      margin-top: 4px;
      &:first-of-type {
        margin-left: 15px;
      }
      &:last-of-type {
        margin-right: 15px;
      }
      &.active {
        color: #fff;
        &::before {
          content: '';
          background: #fff;
          display: inline-block;
          width: 8px;
          height: 8px;
          border-radius: 50%;
          position: relative;
          margin-right: 4px;
        }
      }
      // close 按钮
      .el-icon-close {
        width: 16px;
        height: 16px;
        line-height: 10px;
        vertical-align: 2px;
        border-radius: 50%;
        text-align: center;
        transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
        transform-origin: 100% 50%;
        &:before {
          transform: scale(0.6);
          display: inline-block;
          vertical-align: -3px;
        }
        &:hover {
          background-color: #b4bccc;
          color: #fff;
        }
      }
    }
  }
</style>
